package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;


import com.sky.service.UserService;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl  implements UserService {
    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";
    @Autowired
    private  WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;
    /**
     * 用户登录
     * @param userLoginDTO
     * @return
     */
    @Override
    public User login(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO);
        //判断openid是否为空
        if (openid == null){
           throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user =userMapper.getByOpenid(openid);
        if(user==null){
            //是新用户，自动完成注册
            user= User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }

    private String getOpenid(UserLoginDTO userLoginDTO) {
        //调用微信接口，获取openid
        Map<String, String> claims = new HashMap<>();
        claims.put("appid",weChatProperties.getAppid());
        claims.put("secret",weChatProperties.getSecret());
        claims.put("js_code", userLoginDTO.getCode());
        claims.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, claims);
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
